Part Number: UC3854B Other Parts Discussed in Thread: UC3854
Hi Team, The following application note refers about "CURRENT AMPLIFIER OFFSET VOLTAGE CANCELLATION". http://www.tij.co.jp/jp/lit/an/slua172/slua172.pdf The design generates 4.28mV (…
Part Number: UC3854B Hello,
Make UC385BDW board, and under testing.
But Several boards are abnormal output waveform as attached. Many others are normal output waveform.
Could you let me know why this kind of symptom occurred?
Is it related with UC3854BDW…
Part Number: UC3854B Hello,
We’re having an issue with the UC3854B PWM controller. Specifically for the current amplifier section (pins 3, 4, 5), what is the input common mode operational range? The datasheet shows a CMMR Rejection spec. but not an operational…
Other Parts Discussed in Thread: UC3854B , UCC28070 , UCC28180 I am starting a design in which I would like to use the UC3854B IC. I am getting stuck at the point in the design where it says to calculate Rimo. My issue is the power levels I am trying to…
Hello Supardi,
Thank you for using the UCC28019 PFC controller and UCC256404 LLC controller in your charger design.
The conducted EMI signature shows very low low-frequency noise, which represents the converters fundamentals and low harmonics, but very…
Thank you Harish. Appreciate the help.
Please see the attached example before and after comparison. Here we reduced the X-filter capacitance by 1/3 and the harmonic distortion is generally improved, except the 13th harmonic still fails by about 3mA.…
Part Number: UCC28070 Other Parts Discussed in Thread: UCC28180 , UC3854B Hi
Can i use this chip as a single channel PFC controller, and what happens in light load when it goes into DCM?
Does the inductor "Downslope imitator" still work properly when in…
Hi Renan,
The startup supply current of UC3854A and UC3854B is 300uA. But I didn't find this information of UC3854.
I am checking it and will get back to you soon.
Regards,
Teng
